摘要:
Verfahren zur Herstellung von Sinterformteilen mit einem Gehalt an feinverteiltem Kohlenstoff durch Verformen eines Gemisches aus
a) einem keramischen und/oder metallischen Pulver und b) Polyoxymethylen und/oder einem Copolymerisat mit überwiegenden Anteilen an Oxymethyleneinheiten
zu einem Grünkörper, Entfernen des Bindemittels durch Behandlung mit einer gasförmigen Säure, Pyrolyse und Sintern, wobei man dem Gemisch aus a) und b) einen Thermoplasten c) zusetzt, der bei Temperaturen von 90 bis 220°C geschmolzen, mit Polyoxymethylen mischbar und beständig ist und mit Formaldehyd keine Vernetzungsreaktion eingeht sowie eine Zusammensetzung für dieses Verfahren.
摘要:
A thermoplastic polymer composition which is excellent in flexibility, mechanical properties, and moldability, capable of adhering to ceramics, metals, and synthetic resins without a treatment with a primer, and exhibits a high adhesion strength even when exposed to a high temperature environment, and a molded product obtained by using the thermoplastic polymer composition. The thermoplastic polymer composition includes 100 parts by mass of a thermoplastic elastomer (A), 1 to 100 parts by mass of a polyvinyl acetal resin (B), and 0.1 to 300 parts by mass a softener (C). The thermoplastic elastomer (A) is a block copolymer including a polymer block constituted by aromatic vinyl compound units and a polymer block constituted by conjugated diene units or a hydrogenated product of the block copolymer. The polyvinyl acetal resin (B) has a glass transition temperature of 80 to 130 °C.
摘要:
A composition for producing ceramics, which contains one or more starting powders selected from the group consisting of metallic powder, metal oxide powder, metal carbide powder, metal nitride powder and metal boride powder, and polyalkylene carbonate as a synthetic resin binder. The binder serves to enhance plastic moldability such as injection moldability or extrusion moldability and facilitate degreasing.
摘要:
The present invention provides particles each having a sinterable core and a polymeric coating on at least a part of the core, wherein the polymeric coating comprises a polymer that can be removed via decomposition by heat, catalytically or by solvent treatment, and wherein the polymeric coating is present in an amount of 0.10 to 3.00 % by weight, relative to the total weight of the particles, as well as the use of these particles in an additive manufacturing process such as a powder bed and inkjet head 3D printing process. The particles and the process are able to provide a green part having improved strength and are thus suitable for the production of delicate structures which require a high green strength in order to minimize the risk of structural damage during green part handling.
摘要:
A dispersion comprising hard material particles and at least one organic binder and/or at least one plasticizer. The hard material particles comprise an inner core comprising a fused tungsten carbide and an outer shell comprising tungsten carbide.